ab_y abc_xw abcdefv_

In each set, 2nd number = ( 1 st number - 3rd number)
As , 32-8=24
similarly , 24 - 8 = 16

Rules
(i) (Odd number) x (Composite odd number)
(ii) (Even number) + (Odd number)
(iii) (Even number) ? (Perfect square number), then (Perfect square number) - (Even number)
(iv) (Odd number) ÷ (Prime odd number)
(v) (Odd number) - (Even number)
Solution
1st Row 58   17   5 ? 58 + 17 = 75       [rule (ii)]
?     75 ÷ 5 = 15     [rule (iv)]
          = n
2nd Row 85   5   n ? 85   5   15
?         85 ÷ 5 = 17   [rule (iv)]
?       17 x 15 = 255     [rule (i)]
? Resultant of second row = 255

All other items blong to the same class

MONR

Meaningful order:
(a) Seed B (b) Plant B (e) Tree B (c) Flower B (d) Fruit

'Net' is required to 'Trap' and 'Money' is required to 'Trade'.

'Russian' parliament is called 'Duma' . Similarly, 'Afghanistan's' parliament is called 'Shora' .